Design And Implementation Of Touch Screen In Media Terminal

In order to achieve interoperability of the network layer, seamless coverage, the business of mutual penetration and cross-layer, unified IP protocol used in application layer, the media terminal product established in tri-networks integration comes to being. The terminal takes information dissemination and interactive advertising business as a whole, and it combines with interactive media service platform to provide users with high-quality media information and a variety of real-time interactive services.In the hardware, the terminal embedded Linux operating system, base on the Atom ce3100 processor and use infrared Touch Screen. Infrared touch screen is an integral part of the terminal as one of the key sub-module. It is worth studying the problems existed in the current media features, that is, backward Touch screen-driver design, single interactive and the failure of touch-screen calibration. To solve these problems, it's for the purpose that make the touch screen to meet the higher requirements of media terminal about functions, size, cost, power consumption and so on.This is based on research needs of the media terminal, proposes design and implementation of infrared touch screen and combined with on-screen keyboard example to apply with touch screen. Specific works are focused on driver program and the design of five-point calibration algorithm, and apply Input subsystem and platform bus architecture based on new Linux kernel to driver program rather than traditional method of device driver design. Finally, the analysis on Implementation of on-screen keyboard is made.Because of its excellent light transmission, precise location and uprising ability of wear to adapt to the harsh environment, it is favored by media terminal. It enables terminal debugging, background maintenance, operational services have a good ease of human-computer interaction and achieve stable, intuitive and easy-touch effect, thereby enhancing the user experience of media terminal satisfaction and having positive market effect.